check that abox has been ticked

[Awestruck]

Hello folks

My mind has gone blank, it is such a long time since I designed my php form handler I have forgotten how to write this bit of code.

I have four check boxes, I want to test that at least one has been ticked.
If none has been ticked the handler then puts up an error message.

I incorrectly thought this would do it

//Check that at least one box has been ticked
if ((!$w98me2000) || (!$xp) || (!$vista) || (!$w7)) {
header( "Location: $boxerrorurl" );
exit ; }

I think its my use of the OR that is wrong.

Please would you show me how to achieve this.

[NogDog]

You want to do an "and" comparison, not an "or" to see if they are all empty.

[Awestruck]

Dear NogDog

Brilliant! it worked and I am most grateful for your help and your very prompt reply.

Surprising how rusty we get when we have not created a PHP document for some time.

Best wishes

Awestruck